Floor cleaning device



FIG. 1 is a front perspective view of a floor cleaning device;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a right elevation view thereof;

FIG. 5 is a left elevation view thereof; and,

FIG. 6 is a top plan view thereof.

The broken lines showing environment are for illustrative purposes only and form no part of the claimed design; 

CLAIM The ornamental design for a floor cleaning device, as shown and described. 